I cannot but feel a really deep doubt that the very professional thieves who performed that amazing heist at the Gardner ever read the book; but who knows. When you don't know, all you can do is make a guess one way or the other. Me, I just cannot imagine men who are engaged in that sort of thing being readers of mystery books! And it is not as if this one was on the Best Seller lists and available in every airport book kiosk.
The book, THE book to read about Isabella Stewart Gardner is MRS. JACK by Louisa Hall Tharp.
I, too, have had the great privilege of visiting Boston and being directed to be sure not to miss this museum. A dear cousin and I made a point of spending time there. I am still in awe of Isabella's accomplishment, her dream, and the works of art. I would not want to live in that palace, but it would be fun to visit someone who lived there were it once again a private home. I am glad it is required that they keep it forever as she wanted it to be, because it is my feeling that we not only come away having seen many precious works of art, but the whole collection is Isabella's conception of HER work of art. For sure!